Hotbed.



A. W. GRIFFITH.

HQTBED.. APPLIOATIQI rILBn 52M. 12, 1910/ Patented May 21, 1912.

3 SHEETi-BKEET 1..

A. W. GRIFFITH.

Patented May 21, 1912.

3' SHEETS-MEET 2.

NVENTOR WITNESSES A; W. GRIFFITH.

HO'I'BED.

APPLICATION rum) PT. 12, 1910.

Patented May 21, 1912.

3 SHEBTBBHEET 3.

WITNESSES UNITED STATES PATENT OFFICE:

ASA 'W. GRIFFITH; F YOUNGSTOWN, OHIC.

Korean:

. To all whom it may concern:

. Be it known that I, AM W. GRIFFITH, of Youngstown, in the county of Mahoning and. .State of Ohio, have invented a new and usefuLHotbed, of-which the following is" a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates toapparatus used in handling metal bars and similarly rolled shapes and more particularly to apparatus employed in handling such materials while being cooled from the hot state in which they are delivered from the finishing rolls of a rolling mill:

' In the operation of merchant mills a.

large number and variety of shapes are rolled, both symmetrical. and unsymmetri- .cal, which vary greatly in cross sectional contour.v Unsymmetrical shapes in cooling become curved longitudinally owing to the thinner portions of such shapes cooling more rapidly than adjacent thicker heavier 5 ,portions, and to overcome the tendency of 2 suchunsymmetrical shapes to bend in cooling the shapes are cambered or bent in a direction opposite to that which the shape ordinarily will assume in cooling so that when the thicker heavier parts of the shapes are cooled the cooledshapes will be approximately straight.

By reason of the necessity for transferring unsynnnetrical shapes transversely of their length upon the hot beds while cambered or bent, creeping .hot beds having notched upper surfaces or edges are not adapted for use in handling such products of'the merchant mills, and heretofore hand beds having flat supporting surfaces have been employed with mills making both N symmetrical and unsymmetrical'shapes, the product being dragged'or pulled across the flat face of the hot bed by hand. I

0ne object of y invention is to provid 5 a. creeping hot bed for mechanically handling rolled metal bars during cooling, which is also adapted for use as a hand bed, i. e.,

a bed in which; the materials are moved across its'width by hand. Another object of thisinvention is to .provillea' creeping hot bed which is arranged to automatically remove bars sidewisefrom the feed roller table upon which the bars are delivered lengthwise alongside the hot bed. A further object of the invention is to provide. a hot bed having improved means bywhich the driving Specification of Letters Patent. Pa,tente(1 May 21, 1912. Application filed September 12, 1910. Serial No. 581,567.

materials being handled are conveyed at separated intervals across the width of the accordance with my invention and adapted for use in transferring materials to opposite sides of a centrally located delivery table. Fig. 2 is a sectional end elevation of the apparatus shown in Fig. 1. Fig. 3 is asectional side elevation showing'a detail of the liftin mechanism by which the receiving ends 0 the lifting bars are actuated. Fig. 4 is a side elevation of the mechanism shown in Fig. 3. Fig. 5is a detail of the crank shaftby which the lifting bars are actuated. Flg. 6 is a detail end elevation showing the construction of the'runways or tracks for the reciprocating ends of the cross beams.

In the drawings, 2, 2 designate the feed I rollers of delivery tables-upon which rolled materials are delivered lengthwise alongside the hot bed.- The rollers 2 deliver materials which are transferred to the receiving side of the left hand bed of the double hot bed, the rollers 2' being similarly employed to deliver materials to the receiving side of the right hand bed (the one illustrated). p

As shown, the rollers 2, 2?, are mounted on the overhung ends of shafts 3 which are rotatablysecur'ed in bearings 4. Also keyed or otherwise secured on the shafts 3 arev driving sheave wheels 5. j An endless rope 6 orother flexible sheave driving connec- Jtionfismounted so as to engage-with the lower side of the grooves ln the sheave wheels 5 being held in driving engagement hot bedwith a suitable driving motor,

.by means of idler. sheave wheels 7. The

which be of any desired type, a tightening wheel or pulley being located at the opposite endof .the bed toyieldingly hold the driving rope 6 in' engagement withthe rope tightening mechanisms being. old and wheels 5. ";'I he rope pdrivig g and well known and not forming part of this invention need not be further described.

On the opposite or delivery sides of the hot beds are feed rollers 8 forming a roller table upon which the materials are received from the hot beds and by means of which the materials are delivered lengthwise to a shear, saw, place of storage, or other point of disposal, after the materials have been cooled upon the hot bed. The feed rollers 8 are mounted in bearings 9 and the rollers are driven through bevel gears 10 and the line shaft 11 by a suitable motor operatively connected by suitable slow down gearing to the shaft 11. Apron plates 12 are mounted between the feed rollers, as is shown in Figs. 1 and 2, being secured to the side beams 12 forming a part of the delivery roller table. 1

Secured by their ends upon the apron plates 12 and upon the supports 13 and the beams 14 employed for supporting the bearings 4, is a series of grids or slotted plates 15. These plates have a flat upper surface upon which the materials being handled rest when not being lifted and moved transversely sidewise by the notched movable bars 16 of the hot bed.

Secured in suitable rectangular openings formed at intervals in the length of the hot bed between the stationary grids 15 are the movable notched lifting bars 16 by which the materials ordinarily will be moved transversely of their length across the width of the hot bed.

The bars 16 are provided with feet 17 by which they are mounted upon the beams 18 which extend parallel with the length of and beneath the hot bed. The beams 18 are mounted on shoes 19 secured upon the cross beams 20 forming the lifting frame of the hot bed and the reciprocating nonlifting end of each cross beam 20 is provided with an anti-friction roller 21 rotatably mounted on the brackets 22 by which the wheels 21 are secured to the end of the beam 20. Suitable tracks'or runways 21 upon which wheels 21 reciprocate when the bed is being-used are located beneath the hot bedas shown in Fig. 2.

On the opposite end of the beams 20 are bearings 23 in which the cranks 24 are mounted. The cranks 24 have bearing portions 25 which are secured in stationary bearings 26 mounted on the pillow blocks 27 located beneath the hot bed. The cranks 24 are connected by means of suitable coupling members 28 to driving shafts 29, the

.driving shafts 29 being connected to and of the lever 28 is provided with a counterweight 30 by means of which the tilting ends of the movable bar 16 and supporting framework are counter-balanced and the power necessary to operate the hot bed is reduced.

The notched bars 16 located at suitable intervals in the length of the hot bed preferably are not as long as the grids 15. Between the stationary grids 15 are the rocking arms 31 having one end pivoted to the brackets 32 on the inner side of the apron plates 12 forming part of the delivery table.

of the hot bed. The swinging ends of the arms 31 are curved downwardly so as to always extend below the top surface of the grids 15 so as to form a guard which will prevent the materials being handled from being moved under the lifting arms 31 when in raised position and interfering with the lowering of the arms 31 as otherwise might occur. The swinging ends of the rocking arms 31 are connected by links 32 to lever arms 33, which are keyed or otherwise secured to the rocking shaft-34 by which the rocking arms 31 are tilted and the tilting shaft 34 is provided with a tilting arm 35 which is connected by links 36 with one end of the plunger 37 of a fluid pressure cylinder 38 by which the plunger is actuated in raising and lowering the tilting arms 31.

In the operation of my improved apparatus the bars or other materials being handled are delivered endwise from the feed rollers 2 of the roller delivery table until in position alongside the hot bed. The shaft 29 is then caused to rotate. When the shaft 29 and the cranks 24 connected thereto are rotated, the frame work formed by the beams 18 and 20 is moved so as to lift and move the notch bars 16 lengthwise and tilt the rear ends thereof, the forward end of the beams 20 moving forwardly and backwardly on the track 21 for the anti-friction roller 21. When the rear ends of the bars 16 are rising or tilting upwardly while being moved they ,will lift the bars from the feed rollers 2 and deliver them transversely s1dewise onto the top surface of the grids 15. Upon continuing the movement of the lifting bars 16, successive bars are lifted from the delivery table rollers 2 and are gradually moved across the width of the hot bed, finally being discharged upon the delivery side of the hot bed. It will be seen by reference to Fig. 2 that the lift of the receiving end of the notched bars 16 is greater than that of the delivery end of these bars, the elliptical path of movement at d1fl"erent points in the length of the bars belng indicated by the ellipses A, B, and C. When a sufliclent number of bars has been collected on the delivery side of the grids forming the stationary portion of the hotbed beyond the ends of the notched bars 16, the

V with the notched bars in their lowermostlifting arms 31 are raised from the position shown by full lines in Fig. 2 into that shown in broken lines, this movement of the bars 31 discharging the collected bars from the grids 15 to the rollers 8 of the roller delivery table. The materials. on the rollers 8 are then removed endwise to a shear or other point of disposal. I

It will be noted by reference to Fig. 2 that when the notched lifting bars 16 are in their lowermostposition the extreme top of the projections on these notched bars will be'belo'w the upper surface of the stationary grids 15, as shown in Fig. 2 the positions illustrated bein the highest and midway between the hig est and lowest positions assumed by the lifting bars, and the lower position of-the notched bars being indicated by the lower portions of the ellipses A, B and C. By stopping the crank shaft 29 position, the desired flat surface is secured in uslng my bed which will permit of cambered or curved shapes beinghandled, and the advantage of a hot bed adapted for use as a creeping hot bed and as a hand bed is thereby secured. a

The advantages of my invention will-be apparent to those skilled in the art. The apparatus is simple and is easily kept in re air. I

odifications in the construction and arrangement of the parts maybe made without departing from my invention as defined in the claims.

I claim 1. A creeping hot bedhaving stationary across the width. of the hot bed, said actuat-- ing means being arranged to lift one end of the liftingbars while moving said bars lengthwise in transferring the materials sidewise across the hot bed.

2. A creepin hot bed having a series of stationary gri s forming supports for the materials being handled, a series of movable bars located at separated points in the length of the hot bed and forming reciproeating supports for said materials, and means for actuating the movable bars to transfer materials sidewise across the width of the ha bed, on. end of said movaba bars -face, the moving frame being supported at one side be 0nd the marginal edges of the stationary at surface, the opposite side of said frame bein lifted during the horizontal movement 0 the frame.

4. In a hot bed, a series of horizontally movable lifting bars, fixed supports alternating with said movable bars in supporting materials being handled, and means for actuating said lifting bars to transfer the materials sidewise from one side to the other of said hot bed, said means being arranged to lift one end of the lifting bars during the horizontal movement of said bars.

5. A hot bed having a series of grids forming stationary supports for the materials being handled, a series of'longitudinally movable bars located at separated points in thelength of the hot bed and formlng movable supports for said materials, and means for actuating the movable bars to transfer materials sidewise across the width of the hot bed arranged to lift one end of the bars during the lengthwise movement thereof, said actuatlng means being ar-.

ranged to move and hold the lifting bars below the level of the top surface of said grids.

6. A hot bed having a series of grids forming stationary supports for the materials being handled, a series of longitudinally movable bars located at separated points in the length of the hot bed and form- 'ing movable supports for said materials, and

Witnesses:

E. H. SCHRADER, Y O. H. FOWLER.

ASA w. GRIFFITH. l 

